[PATCH v2 29/45] target/arm: Implement fp16 for Neon VMAXNM, VMINNM

[Peter Maydell]

Convert the Neon floating point VMAXNM and VMINNM insns to
using a gvec helper and use this to implement the fp16 case.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.h             |  6 ++++++
 target/arm/vec_helper.c         |  6 ++++++
 target/arm/translate-neon.c.inc | 23 +++++++++++++++--------
 3 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/target/arm/helper.h b/target/arm/helper.h
index e252f380a89..f621940e69d 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -653,6 +653,12 @@ DEF_HELPER_FLAGS_5(gvec_fmax_s, TCG_CALL_NO_RWG, void, 
ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_5(gvec_fmin_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_5(gvec_fmin_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
 
+DEF_HELPER_FLAGS_5(gvec_fmaxnum_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, 
i32)
+DEF_HELPER_FLAGS_5(gvec_fmaxnum_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, 
i32)
+
+DEF_HELPER_FLAGS_5(gvec_fminnum_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, 
i32)
+DEF_HELPER_FLAGS_5(gvec_fminnum_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, 
i32)
+
 DEF_HELPER_FLAGS_5(gvec_ftsmul_h, TCG_CALL_NO_RWG,
                    void, ptr, ptr, ptr, ptr, i32)
 DEF_HELPER_FLAGS_5(gvec_ftsmul_s, TCG_CALL_NO_RWG,
diff --git a/target/arm/vec_helper.c b/target/arm/vec_helper.c
index 9d05e1a568b..f551f86d5a5 100644
--- a/target/arm/vec_helper.c
+++ b/target/arm/vec_helper.c
@@ -823,6 +823,12 @@ DO_3OP(gvec_fmax_s, float32_max, float32)
 DO_3OP(gvec_fmin_h, float16_min, float16)
 DO_3OP(gvec_fmin_s, float32_min, float32)
 
+DO_3OP(gvec_fmaxnum_h, float16_maxnum, float16)
+DO_3OP(gvec_fmaxnum_s, float32_maxnum, float32)
+
+DO_3OP(gvec_fminnum_h, float16_minnum, float16)
+DO_3OP(gvec_fminnum_s, float32_minnum, float32)
+
 #ifdef TARGET_AARCH64
 
 DO_3OP(gvec_recps_h, helper_recpsf_f16, float16)
diff --git a/target/arm/translate-neon.c.inc b/target/arm/translate-neon.c.inc
index 621d6524df1..13858aaa08b 100644
--- a/target/arm/translate-neon.c.inc
+++ b/target/arm/translate-neon.c.inc
@@ -1151,6 +1151,11 @@ static void gen_VMLS_fp_3s(TCGv_i32 vd, TCGv_i32 vn, 
TCGv_i32 vm,
 DO_3S_FP(VMLA, gen_VMLA_fp_3s, true)
 DO_3S_FP(VMLS, gen_VMLS_fp_3s, true)
 
+WRAP_FP_GVEC(gen_VMAXNM_fp32_3s, FPST_STD, gen_helper_gvec_fmaxnum_s)
+WRAP_FP_GVEC(gen_VMAXNM_fp16_3s, FPST_STD_F16, gen_helper_gvec_fmaxnum_h)
+WRAP_FP_GVEC(gen_VMINNM_fp32_3s, FPST_STD, gen_helper_gvec_fminnum_s)
+WRAP_FP_GVEC(gen_VMINNM_fp16_3s, FPST_STD_F16, gen_helper_gvec_fminnum_h)
+
 static bool trans_VMAXNM_fp_3s(DisasContext *s, arg_3same *a)
 {
     if (!arm_dc_feature(s, ARM_FEATURE_V8)) {
@@ -1158,11 +1163,12 @@ static bool trans_VMAXNM_fp_3s(DisasContext *s, 
arg_3same *a)
     }
 
     if (a->size != 0) {
-        /* TODO fp16 support */
-        return false;
+        if (!dc_isar_feature(aa32_fp16_arith, s)) {
+            return false;
+        }
+        return do_3same(s, a, gen_VMAXNM_fp16_3s);
     }
-
-    return do_3same_fp(s, a, gen_helper_vfp_maxnums, false);
+    return do_3same(s, a, gen_VMAXNM_fp32_3s);
 }
 
 static bool trans_VMINNM_fp_3s(DisasContext *s, arg_3same *a)
@@ -1172,11 +1178,12 @@ static bool trans_VMINNM_fp_3s(DisasContext *s, 
arg_3same *a)
     }
 
     if (a->size != 0) {
-        /* TODO fp16 support */
-        return false;
+        if (!dc_isar_feature(aa32_fp16_arith, s)) {
+            return false;
+        }
+        return do_3same(s, a, gen_VMINNM_fp16_3s);
     }
-
-    return do_3same_fp(s, a, gen_helper_vfp_minnums, false);
+    return do_3same(s, a, gen_VMINNM_fp32_3s);
 }
 
 WRAP_ENV_FN(gen_VRECPS_tramp, gen_helper_recps_f32)
-- 
2.20.1